You can add and remove training zones to fully customize your workout data. Each Zone can have a Training Index (TI - See Glossary) for as well as a color for charting purposes. You can edit any of these values on existing zones or create your own new zones. As with the other customizable options, you can move the zones up and down to specify the order they should appear in your log drop-down lists. You can also remove (or hide) zones if you no longer wish to use them.